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School Leaders

Owen Losse
Senior Principal
After joining Uncommon Schools in 2009 as an Instructional Fellow, Mr. Losse became the founding Principal of Leadership Prep Bedford Stuyvesant Middle Academy in 2010. Originally, from Phoenix, Mr. Losse earned his B.A. in Math from Lewis and Clark College in Portland, OR, and subsequently his M.S. in Teaching and Adolescent Education from Pace University. Mr. Losse has dedicated his career to education, and has previously worked with Harlem Village Academy and Teach for America, both as a TFA Corp Member and later a Math Content Specialist. 

Gretchen Reifeis
Director of Operations
Ms. Reifeis first joined Uncommon Schools in operations as an Office Manager at Williamsburg Collegiate in 2013. Since 2013, she has held all possible operations positions at Uncommon Schools before becoming the Director of Operations at Leadership Prep Bedford Stuyvesant in the 2016-2017 school year. Originally from Indianapolis, before Uncommon, Ms. Reifeis attended Purdue University, where she studied business management and Spanish, and worked in Spain as an English teacher.